sideline [ 'saidlainiŋ ]

• n.
  • a line that marks the side boundary of a playing field

    同义词： out of bounds

  • an auxiliary line of merchandise
  • an auxiliary activity

    同义词： avocation by-line hobby pursuit spare-time activity

• v. remove from the center of activity or attention; place into an inferior position

  "The outspoken cabinet member was sidelined by the President"

以上来源于: WordNet